SERVICE MANUAL
1.3 2×8W Stereo BTL Audio Output Amplifier with DC Volume Control TDA7057AQ
(1) Features
·
DC volume control
·
Few external components
·
Mute mode
·
Therm
·
Short-circuit proof
·
No switch-on and switch-off
clicks
·
Good overall stability
·
Low HF radiation
(2) General Description
The TDA7057AQ is a stereo BTL output amplifier
with DC volume control. The device is designed
for use in TVs and monitors, but is also suitable for
battery-fed portable recorders and radios.
Missing Current Limiter (MCL)
A MCL protection circuit is built-in. The MCL
circuit is activated when the difference in current
between the output terminal of each amplifier
exceeds 100 mA (typical 300 mA). This level of
100 mA allows for single-ended headphone
applications.
(3) Block Diagram
al protection
·
Low power consumption
·
ESD protected on all pins.
Fig. 13
(4) Refer to Table 14 about Functions and Data of the IC’s Pins.
26
Summary of Contents for 25F83
Page 18: ...SERVICE MANUAL 3 Black Diagram 7 21 ...
Page 19: ...SERVICE MANUAL 8 22 ...
Page 20: ...SERVICE MANUAL 4 Pining 5 Refer to Table 12 about Functions and Data of the IC s Pins 9 23 ...
Page 46: ...CIRCUIT DIAGRAM JUC 820 975 JUC 820 591 JUC 820 725 JUC 820 644 APPENDIX ...
Page 47: ...Circuit Diagram for CRT RGB PCB of 25F83 PF25F83 ...
